Photo of coontail aquatic plant with penny for scale

    Coontail (Hornwort)

    Ceratophyllum demersum
    Picture of a patch of filamentous green algae floating in a stream.

    Filamentous Green Algae (Pond Scum)

    Cladophora, Pithophora, and Spirogyra spp., and others
    Photo of several big bluestem seed heads against a blue sky.

    Grasses

    All true grasses (species in the grass family).
    Photo of Johnson grass flower clusters

    Johnson Grass

    Sorghum halepense
    invasive icon

    Invasive

    Photo of American pondweed leaves floating on water surface

    Pondweeds

    Potamogeton spp.
    Photo of several reed canary grass plants with flowering heads

    Reed Canary Grass

    Phalaris arundinacea
    invasive icon

    Invasive

    Photo of path rush, closeup showing drying fruits.

    Rushes

    Juncus spp. and Luzula spp.
    Photo of eastern woodland sedge plant growing among leaf litter.

    Sedges

    Carex, Schoenoplectus, Scirpus, and other genera
    Photo of tall fescue plants

    Tall Fescue

    Festuca arundinacea
    invasive icon

    Invasive